125B · 2 knobs
PedalPCB· PCB625
Skeptical Boost
Based on the 29 Pedals jFet Boost· 1 other board clones it
- Category
- Fuzz· OD / Distortion / Fuzz
- Price
- $12.00in stock
- Tags
- 125B, Signal Schmalzigrrs
From the vendor
Controls
• Level
• Voice (Toggle switch)
Details
• Accepts 7.5V – 24V input, AC or DC (either polarity)
• Designed for a 125B enclosure with top-mounted jacks
The company, product and service names used in this web site are for comparative purposes only. All trademarks and registered trademarks are the property of their respective owners. This product is not manufactured or distributed by 29 Pedals, maker of the 29 Pedals JFET.
PedalPCB is in no way affiliated with 29 Pedals.
Schematic
The schematic is in the vendor's build document, page 3. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 48 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 22 | ||||
| R1 | 3M3 | 3.3M | Resistor, 1/4W | |
| R2 | 1K5 | 1.5k | Resistor, 1/4W | |
| R3 | 470K | 470k | Resistor, 1/4W | |
| R4 | 5K6 | 5.6k | Resistor, 1/4W | |
| R5 | 330R | 330 | Resistor, 1/4W | |
| R6 | 180R | 180 | Resistor, 1/4W | |
| R7 | 2K2 | 2.2k | Resistor, 1/4W | |
| R8 | 10K | 10k | Resistor, 1/4W | |
| R9 | 470K | 470k | Resistor, 1/4W | |
| R10 | 220K | 220k | Resistor, 1/4W | |
| R11 | 49K9 | 49.9k | Resistor, 1/4W | |
| R12 | 10K | 10k | Resistor, 1/4W | |
| R13 | 470R | 470 | Resistor, 1/4W | |
| R14 | 100K | 100k | Resistor, 1/4W | |
| R15 | 2K2 | 2.2k | Resistor, 1/4W | |
| R16 | 33K | 33k | Resistor, 1/4W | |
| R17 | 18K | 18k | Resistor, 1/4W | |
| R18 | 2K2 | 2.2k | Resistor, 1/4W | |
| R19 | 47R | 47 | Resistor, 1/4W | |
| R20 | 100K | 100k | Resistor, 1/4W | |
| R21 | 470K | 470k | Resistor, 1/4W | |
| CLR | 6K8 | 6.8k | Resistor, 1/4W | LED current limiting resistor |
| Capacitors 15 | ||||
| C1 | 10u | 10u | Tantalum capacitor | |
| C2 | 47u | 47u | Tantalum capacitor | |
| C3 | 1u | 1u | Tantalum capacitor | |
| C4 | 100u | 100u | Tantalum capacitor | |
| C5 | 10u | 10u | Tantalum capacitor | |
| C6 | 4u7 | 4.7u | Tantalum capacitor | |
| C7 | 470p | 470p | Ceramic capacitor | |
| C8 | 470p | 470p | Ceramic capacitor | |
| C9 | 68n | 68n | Film capacitor, 7.2 x 2.5mm | |
| C10 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C11 | 47u | 47u | Tantalum capacitor | |
| C100 | 100u | 100u | Electrolytic capacitor, 5mm | � 35V minimum |
| C101 | 10u | 10u | Electrolytic capacitor, 5mm | |
| C102 | 10u | 10u | Electrolytic capacitor, 5mm | |
| C103 | 10u | 10u | Electrolytic capacitor, 5mm | |
| Diodes 4 | ||||
| D100 | 1N5819 | 1N5819 | Schottky diode, DO-41 | |
| D101 | 1N5819 | 1N5819 | Schottky diode, DO-41 | |
| D102 | 1N5819 | 1N5819 | Schottky diode, DO-41 | |
| D103 | 1N5819 | 1N5819 | Schottky diode, DO-41 | |
| Transistors 2 | ||||
| Q1 | 2SK3557 | 2SK3557 | JFET transistor, N-channel | Specs as measured on page 3 |
| Q2 | 2SK3557 | 2SK3557 | JFET transistor, N-channel | Specs as measured on page 3 |
| ICs 3 | ||||
| IC1 | LF412CP | LF412CP | Dual op-amp, DIP8 | |
| IC100 | L78L05 | L78L05 | Voltage regulator, +5V | |
| IC101 | IAB0105D12 | IAB0105D12 | Dual Isolated DC/DC Converter | +5Vin, +12V / -12Vout |
| Potentiometers 1 | ||||
| LEVEL | B50K | B50k | 16mm right-angle PCB mount pot | |
| Switches 1 | ||||
| VOICE | ON/OFF/ON | ON/OFF/ON | Toggle switch, SPDT | 3-position (ON/OFF/ON) |
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